The sole suspect charged over last week's Brussels attacks was released Monday following a lack of evidence linking him to the carnage, Belgian prosecutors said.

"The indications that led to the arrest of Faycal C. were not substantiated by the ongoing inquiry. As a result, the subject has been released by the examining magistrate," the federal prosecutor's office said in a statement, without giving further details.

Belgian nedia had identified the man as Faycal Cheffou who claimed to be a freelance journalist.